Configures the primary uplink port to use a preferred medium.
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The default is fiber.
You specify either copper or fiber for the specified port. The switch evaluates the copper energy and the fiber signal at the time these ports come online. If both are present, the configured preferred medium is chosen; however, if only one is present, the switch brings up that medium and uses this medium the next time the switch is rebooted. When a failure occurs and the uplinks are swapped, the switch continues to keep that uplink assignment until another failure occurs or until the assignment is changed using the CLI.
If you use the force option, it disables automatic failover. If you force the preferred-medium to fiber and the fiber link goes away, the copper link is not used, even if available.
To display the preferred medium, use the show port information detail command (you must use the detail variable to display the preferred medium).
The following example establishes copper port 4 as the primary uplink on the Summit series switch and fiber port 4 as the redundant uplink port:
configure ports 4 preferred-medium copper
Copper port 4 becomes the primary uplink until a failure occurs on that link. At that time, fiber port 4 becomes the primary uplink and copper port 4 becomes the redundant port. This assignment stays in place until the next failure.
This command was first available in ExtremeXOS 11.2.
This command is available only on Summit family switches and SummitStack.
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